UFO Theory

Ancient-astronaut lore believes that the Great Pyramids and the Sphinx are creations of superior extraterrestrial technology. Such theories have no real basis in fact.­Fortean Picture Library

UFO theories seek to explain aspects of UFO phenomena. Are aliens already here? What are they like? If UFOs have arrived, where do the spaceships come from? What is it like to witness a UFO? Are particular kinds of people more likely to see UFOs?

These UFO theory articles discuss ways that UFO researchers have tried to shine light on those important questions: